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Open data
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Basic information
| Entry | Database: PDB / ID: 7abf | |||||||||||||||||||||
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| Title | Human pre-Bact-1 spliceosome core structure | |||||||||||||||||||||
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Keywords | SPLICING / Complex / spliceosome / catalytic activation | |||||||||||||||||||||
| Function / homology | Function and homology informationmicrofibril / regulation of vitamin D receptor signaling pathway / regulation of retinoic acid receptor signaling pathway / protein phosphatase regulator activity / positive regulation of mRNA splicing, via spliceosome / nuclear retinoic acid receptor binding / U2-type catalytic step 1 spliceosome / RNA splicing, via transesterification reactions / positive regulation of vitamin D receptor signaling pathway / host-mediated activation of viral transcription ...microfibril / regulation of vitamin D receptor signaling pathway / regulation of retinoic acid receptor signaling pathway / protein phosphatase regulator activity / positive regulation of mRNA splicing, via spliceosome / nuclear retinoic acid receptor binding / U2-type catalytic step 1 spliceosome / RNA splicing, via transesterification reactions / positive regulation of vitamin D receptor signaling pathway / host-mediated activation of viral transcription / U2-type precatalytic spliceosome / mRNA cis splicing, via spliceosome / RNA polymerase binding / Regulation of gene expression in late stage (branching morphogenesis) pancreatic bud precursor cells / RUNX3 regulates NOTCH signaling / U2-type catalytic step 2 spliceosome / Notch binding / U2-type spliceosomal complex / nuclear vitamin D receptor binding / NOTCH4 Intracellular Domain Regulates Transcription / transcription elongation factor activity / positive regulation of neurogenesis / spliceosome conformational change to release U4 (or U4atac) and U1 (or U11) / NOTCH3 Intracellular Domain Regulates Transcription / mRNA stabilization / : / K63-linked polyubiquitin modification-dependent protein binding / nuclear androgen receptor binding / precatalytic spliceosome / WW domain binding / Notch-HLH transcription pathway / Formation of paraxial mesoderm / ubiquitin-like protein conjugating enzyme binding / negative regulation of transcription elongation by RNA polymerase II / positive regulation of transforming growth factor beta receptor signaling pathway / SMAD binding / mRNA Splicing - Minor Pathway / intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / Prp19 complex / negative regulation of mRNA splicing, via spliceosome / spliceosomal tri-snRNP complex assembly / U5 snRNP / U5 snRNA binding / pre-mRNA intronic binding / U2 snRNA binding / U6 snRNA binding / U4/U6 x U5 tri-snRNP complex / Cajal body / U1 snRNA binding / retinoic acid receptor signaling pathway / cellular response to retinoic acid / spliceosomal snRNP assembly / catalytic step 2 spliceosome / spliceosomal complex / mRNA Splicing - Major Pathway / RNA splicing / nuclear receptor binding / cellular response to xenobiotic stimulus / cellular response to tumor necrosis factor / response to cocaine / positive regulation of transcription elongation by RNA polymerase II / mRNA splicing, via spliceosome / Downregulation of SMAD2/3:SMAD4 transcriptional activity / fibrillar center / NOTCH1 Intracellular Domain Regulates Transcription / Pre-NOTCH Transcription and Translation / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / transcription coregulator activity / mRNA processing / mRNA Polyadenylation / nuclear matrix / protein tag activity / rRNA processing / transcription corepressor activity / cellular response to lipopolysaccharide / single-stranded DNA binding / nuclear membrane / Dengue Virus-Host Interactions / RNA polymerase II-specific DNA-binding transcription factor binding / transcription coactivator activity / nuclear speck / negative regulation of DNA-templated transcription / GTPase activity / regulation of transcription by RNA polymerase II / GTP binding / chromatin / negative regulation of transcription by RNA polymerase II / enzyme binding / positive regulation of transcription by RNA polymerase II / DNA binding / DNA-templated transcription / RNA binding / nucleoplasm / zinc ion binding / membrane / identical protein binding / nucleus / cytosol / cytoplasm Similarity search - Function | |||||||||||||||||||||
| Biological species | Homo sapiens (human)synthetic construct (others) | |||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å | |||||||||||||||||||||
Authors | Townsend, C. / Kastner, B. / Leelaram, M.N. / Bertram, K. / Stark, H. / Luehrmann, R. | |||||||||||||||||||||
| Funding support | Germany, 1items
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Citation | Journal: Science / Year: 2020Title: Mechanism of protein-guided folding of the active site U2/U6 RNA during spliceosome activation. Authors: Cole Townsend / Majety N Leelaram / Dmitry E Agafonov / Olexandr Dybkov / Cindy L Will / Karl Bertram / Henning Urlaub / Berthold Kastner / Holger Stark / Reinhard Lührmann / ![]() Abstract: Spliceosome activation involves extensive protein and RNA rearrangements that lead to formation of a catalytically active U2/U6 RNA structure. At present, little is known about the assembly pathway ...Spliceosome activation involves extensive protein and RNA rearrangements that lead to formation of a catalytically active U2/U6 RNA structure. At present, little is known about the assembly pathway of the latter and the mechanism whereby proteins aid its proper folding. Here, we report the cryo-electron microscopy structures of two human, activated spliceosome precursors (that is, pre-B complexes) at core resolutions of 3.9 and 4.2 angstroms. These structures elucidate the order of the numerous protein exchanges that occur during activation, the mutually exclusive interactions that ensure the correct order of ribonucleoprotein rearrangements needed to form the U2/U6 catalytic RNA, and the stepwise folding pathway of the latter. Structural comparisons with mature B complexes reveal the molecular mechanism whereby a conformational change in the scaffold protein PRP8 facilitates final three-dimensional folding of the U2/U6 catalytic RNA. | |||||||||||||||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7abf.cif.gz | 757.8 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb7abf.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 7abf.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ab/7abf ftp://data.pdbj.org/pub/pdb/validation_reports/ab/7abf | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 11694MC ![]() 7aavC ![]() 7abgC ![]() 7abhC ![]() 7abiC M: map data used to model this data C: citing same article ( |
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| Similar structure data | |
| EM raw data | EMPIAR-10616 (Title: Cryo-EM dataset of human pre-Bact spliceosome / Data size: 584.5 Data #1: Motion-corrected micrographs (without dose-weighting) of human pre-Bact spliceosome [micrographs - single frame] Data #2: Motion-corrected micrographs (with dose-weighting) of human pre-Bact spliceosome [micrographs - single frame]) |
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Links
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Assembly
| Deposited unit | ![]()
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Components
-Protein , 12 types, 12 molecules QIArNqRXvGKA4
| #1: Protein | Mass: 17032.850 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: P41223 |
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| #2: Protein | Mass: 37563.863 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: Q8NAV1 |
| #3: Protein | Mass: 273974.250 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: Q6P2Q9 |
| #4: Protein | Mass: 109560.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: Q15029 |
| #5: Protein | Mass: 23664.047 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: Q96NC0 |
| #6: Protein | Mass: 8560.945 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: Q9BZL1 |
| #7: Protein | Mass: 26674.447 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: Q9P013 |
| #10: Protein | Mass: 70098.641 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: Q9Y2W2 |
| #11: Protein | Mass: 61610.703 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: Q13573 |
| #12: Protein | Mass: 57280.758 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: O43660 |
| #14: Protein | Mass: 52050.527 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: P55081 |
| #15: Protein | Mass: 121870.320 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: UniProt: O14776 |
-RNA chain , 3 types, 3 molecules 56Z
| #8: RNA chain | Mass: 36908.668 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela / References: GenBank: 36515 |
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| #9: RNA chain | Mass: 34098.270 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: Hela |
| #13: RNA chain | Mass: 73712.359 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
-Non-polymers , 3 types, 3 molecules 




| #16: Chemical | ChemComp-IHP / |
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| #17: Chemical | ChemComp-GTP / |
| #18: Chemical | ChemComp-MG / |
-Details
| Has ligand of interest | N |
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| Has protein modification | N |
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
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| Molecular weight | Units: MEGADALTONS / Experimental value: NO | ||||||||||||||||||||||||
| Source (natural) |
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| Source (recombinant) | Organism: synthetic construct (others) | ||||||||||||||||||||||||
| Buffer solution | pH: 7.9 | ||||||||||||||||||||||||
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
| Specimen support | Grid material: COPPER / Grid type: Quantifoil R3.5/1 | ||||||||||||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: FEI TITAN KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: SPOT SCAN |
| Electron lens | Mode: BRIGHT FIELD |
| Image recording | Average exposure time: 1 sec. / Electron dose: 2.25 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON III (4k x 4k) |
| Image scans | Width: 4096 / Height: 4096 |
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Processing
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||
| 3D reconstruction | Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 84539 / Symmetry type: POINT | ||||||||||||||||||||
| Atomic model building | Protocol: RIGID BODY FIT / Space: REAL |
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About Yorodumi




Homo sapiens (human)
Germany, 1items
Citation
UCSF Chimera
















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